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A081166 as a simple table

n a(n)
0 0
1 0
2 1
3 2
4 2
5 3
6 3
7 3
8 4
9 5
10 6
11 12
12 16
13 20
14 31
15 50
16 70
17 106
18 143

[0,0,1,2,2,3,3,3,4,5,6,12,16,20,31,50,70,106,143]

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Last modified September 22 22:24 EDT 2020. Contains 337291 sequences. (Running on oeis4.)